feat(api): update API spec from langfuse/langfuse b3adfc3

[langfuse-bot]

Disclaimer: Experimental PR review

Greptile Summary

This auto-generated PR (from the Fern API definition at langfuse/langfuse@b3adfc3) adds an optional created_at / createdAt field to the dataset run item creation API, allowing callers to explicitly set the creation timestamp rather than relying on the server default.

• Adds created_at: typing.Optional[dt.datetime] parameter to DatasetRunItemsClient.create(), AsyncDatasetRunItemsClient.create(), RawDatasetRunItemsClient.create(), and AsyncRawDatasetRunItemsClient.create().
• Adds the corresponding created_at field to the CreateDatasetRunItemRequest Pydantic model with the createdAt camelCase alias.
• All changes follow the established pattern of the existing dataset_version field (same type, same serialization approach, same documentation style).
• No custom instruction violations were found; all imports remain at the top of their respective modules.

Confidence Score: 5/5

• This PR is safe to merge — it is a minimal, auto-generated additive change that introduces one optional parameter with no breaking changes.
• The change is purely additive (a new optional parameter with a server-side default), auto-generated from the API spec, and mirrors the pre-existing pattern for dataset_version exactly. There are no logic errors, no serialization concerns beyond what already exists, and no breaking interface changes.
• No files require special attention.

Important Files Changed

Filename	Overview
langfuse/api/dataset_run_items/types/create_dataset_run_item_request.py	Adds an optional created_at field (aliased to createdAt) to the Pydantic request model, consistent with existing field conventions.
langfuse/api/dataset_run_items/raw_client.py	Adds created_at: typing.Optional[dt.datetime] parameter to both sync and async create() methods, and includes it as "createdAt" in the JSON request body — mirrors the same pattern as the existing dataset_version field.
langfuse/api/dataset_run_items/client.py	Adds created_at parameter to both sync and async wrapper create() methods and passes it through to the raw client — straightforward delegation change.

Sequence Diagram

sequenceDiagram
    participant Caller
    participant DatasetRunItemsClient
    participant RawDatasetRunItemsClient
    participant LangfuseAPI as Langfuse REST API

    Caller->>DatasetRunItemsClient: create(run_name, dataset_item_id, ..., created_at)
    DatasetRunItemsClient->>RawDatasetRunItemsClient: create(run_name, dataset_item_id, ..., created_at)
    RawDatasetRunItemsClient->>LangfuseAPI: POST /api/public/dataset-run-items\n{ runName, datasetItemId, ..., createdAt }
    LangfuseAPI-->>RawDatasetRunItemsClient: HttpResponse[DatasetRunItem]
    RawDatasetRunItemsClient-->>DatasetRunItemsClient: HttpResponse[DatasetRunItem]
    DatasetRunItemsClient-->>Caller: DatasetRunItem

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